Safety type liquid level height and liquid level potential comprehensive testing device

Abstract

The invention discloses a safety type liquid level height and liquid level potential comprehensive testing device, and particularly relates to the field of electrostatic safety protection in the storage, transportation, loading and unloading processes of petrochemical engineering liquid materials. The safety type liquid level height and liquid level potential comprehensive testing device comprisesa shell, an upper cover; an electrostatic sensitive probe unit and a liquid level height sensing probe unit are arranged on the shell, the electrostatic sensitive probe unit can be a non-contact micro electro mechanical system (MEMS) electrostatic sensitive probe unit, and a signal processing and control unit is arranged in the shell. The electrostatic sensitive probe unit and the liquid level height sensing probe unit are in electric control connection with the signal processing and control unit. The shell comprises a square body, a cylindrical head extends out of one end face of the squarebody, the signal processing and control unit is located in the square body, and the electrostatic sensitive probe unit and the liquid level height sensing probe unit are located on the head. The tailend of the head is provided with a thread at one end, and when the device works, the head is screwed on a storage tank through a thread to be connected with the storage tank.

Description

technical field [0001] The invention relates to the field of static electricity safety protection during storage, transportation, loading and unloading of petrochemical liquid materials, and specifically discloses a safe comprehensive testing device for liquid level height and liquid level potential. Background technique [0002] Liquid combustible materials with low conductivity, such as oil products, are prone to generate static electricity due to flow and collision. When charged liquid materials enter the storage tank to generate a large liquid surface potential, a large electrostatic field is formed in the space above the liquid surface in the tank, which may Induce an ignitable electrostatic discharge between the liquid surface and the tank wall, and between the liquid surface isolated conductor and the tank wall, resulting in an electrostatic explosion accident. Usually, the way of reducing the flow rate and good grounding of the equipment is used to suppress the accum...

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Problems solved by technology

However, the current liquid level potential detection method, such as using EST202 liquid level potential measurement system and a kind of oil level potential measurement system disclosed by the Chinese patent with the publication number CN202848438U, and a closed-loop potential feedback disclosed by the Chinese patent with the publication number CN 104627932A The method and device for early warning of electrostatic hazards in loading and unloading crude oil adopt the method of testing the potential of the oil surface with a floating ball. The floating ball floating on the liquid surface is easy to contact the pipe wall due to sloshing and fluctuating with the liquid level, which is not suitable for online monitoring and is difficult to use for liquid materials. Abnormal monitoring and early warning of liquid surface potential

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